The New Scientistreportsthat researchers at the Institute for Integrative Nanosciences in Dresden, Germany, have created “biobots” or “spermbots” out of metal and bull sperm. Led by Oliver Schmidt, scientists put a fluid containing bull sperm in a 50-micron-long microtube containing iron and titanium particles and controlled its movements using a magnetic field. The goal is to eventually use these biobots for fertilization and drug administration.